what exhaust should i get for my stock engine?

yea man I-81 is a blast but when its just the two of us it just gets old quick. but it is deffinately a lot of fun with a group. my cousins kfx is bone stock, id love to see some aftermarket parts oon his quad. if you want to go to 81 i can give you directions to get there
 
After my dad got his cylinder ported the toomey had good bottom an a strong mid range an the top screams thats with stock gearing and 20s
 
Shearer pipes are suppose to make good power down low. But I read that they have some quality issues with their welds. Any performance pipe will perform better with more mods and porting. But doesn't mean that it wont work on a stock bike. Just gives you head room for later upgrades!